In recent times, in the academic field related to the training of L2 pronunciation teachers, the already existing gap between fundamental research and the application of its results in the classroom has widened. In some degree, this has been a consequence of that training being focused on methodological aspects more than on the intrinsic knowledge of the subject to be taught. In this article, on the basis of two concrete examples, the need for keeping pronunciation teachers permanently informed about the findings of the basic research in phonetics / phonology is defended as a means to achieve a very fruitful interaction between the two sides, theoretical ad applied, of the discipline.